Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
cham xuc » cam xuc, chat xuc, cham soc
ban hanh » ban hang
hieu va » lieu va
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
xuc ban » duc ban, cuc ban, quoc ban
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky lang xa hoi. ((hieu va) OR (hieu qua)) cham xuc ban hanh vi ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ky lang xa hoi. ((hieu va) OR (hieu qua)) cham xuc ban hanh vi ((cua tre) or (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: hoc sach ky lang xa hoi. ((hieu va) OR (hieu qua)) cham xuc ban hanh vi ((cua tre) or (cuu tre))*.